Torch



'May-17, 1932. M. MSCHWARZKOPF 1,858,525

. TORCH Filed June 23, 1930 5 sheets-'sheet 1 .3.3 .3.5 u .za 7 J7 j? j# ,Y 4 f5 l .B j@ Z7 7 6 1 Q f y if 7, 4 f3 l if W f5 Hmmm IN1/N702 May 17, 1932. M. MA scHvvARzKoPF 1,858,526

YTORCH Filed June 25, 1930 5 Sheets-Sheet 2 ,5B/Q I z l ffOEA/EY Patented `May 1,7, 1932 UNITED STATES` 'ronca Application led .Tune 23,

This invention relates generally lto torches and, more particularly, to acertain new and useful improvement in heating torches of the premixing type.

My invention has for one object to provide a torch in which the constituents of the combustible mixture to be burned are p remixed in selected automatically uniform proportions for effecting a steady and vnon-variant 10 flame of the desired characteristics; Y

Another object of my invention is to provide a premixingtorch in which two or more fluids in separate containers are causedqto mingle under controlled pressure conditions,

1E, in which compensation for diminution of volume of the fiuid in one containeris effected by determinable flow of fluid thereinto from the other container. a f

Still another object of my invention is to u provide a-torch in :which the full mixture is effectively commingled and heated for gasification or vaporization thereof. v-

And with the above andy other `objects in view, my invention resides `in the novel features of form, construction, arrangement, and combination of parts hereinafterdescribed and pointed out inthe claims.

, In the accompanying Vdrawings (three sheets),- a f Figure 1 is arear elevation of a torch of my invention, portions thereof being broken away to illustrate the interior arrangement;

s FigureQ is atop plan view of the torch, the mixing head being shown in 4horizontal section;

Figure 3 is an enlarged fragmentaryvertical section of the coverand mixing head;

v I i t Figure 4 is a sectional view taken approximately along the line 4-7-4, Figure 1.

Referring now more in detail and by reference characters to the drawings, which illustrate a preferred embodiment of my invention, an outer or 'so-calledl air-container A, which includes a shell 1` -having ,al preferably PATENT Vlkol-*lsiclfi vMARKUS M. soHWARzKoPF, or's'r. LOUIS, MIssoURr 1930. serial No; '463,2e9.

brazed thereto, has its upper end threaded Into, and for closure by,ran annular flange 4 depending from a detachable cover or closure B, from which interiorly depends, preferf ably concentrically into thel container A, a second annular flange y5 threadedly engaging, for lclosure thereof bythe cover B, an innerV or so-called fuel-container C, `which latter includesy a shell 6 ,having` a Vspun shoulder 6 to which is brazeda bottom wall p 7 preferably, however, upwardly spacedfrom the bottomwall 3 of the outer container A; Located at a side of the container A, intermediate the walls 1 and 6, isan air pump D comprising'a cylinder including a ytubular barrel 8 having an upper lateral flange 9 supportingly engaged between anend of an apertured boss 10 upstanding from the cover B and a cap 11 screwed thereto, the'cap 11 f being suitably'apertured for air admittance, as shown, and bored for the guidable `reciprocation therein .of a Lplunger 112 suitably handled at its outer end and carrying at its inner end la piston 13 having a cup-leather of conventional ,construction thebarrelS. f y Y f- Y l At itsy lower depending. end,j`the barrelwalls are reflexly spun `into a frusto-conical valvefseat 14 apertured at its smaller-.u p-

forI working in spun annular base 2 and a bottom wall.v 3 u Vwardly presented end or apex, as at 15, for Y from the chambers 33, 35, convergingly into' head 21, between which and the cage 16 is seated a compression spring 22 normally upwardly urging the plunger 17 for engaging the valve 18 With the seat 14. i

Air being introduced into'the container A by means of the pump D, a suitable preferably liquid fuel is introduced into the container C through an aperture or filling vent 23 (Figure 1) provided in the cover B, said aperture being normally closedby a detachable cap 24 (Figure 2). Such fuel in the containerC is subjected-to air under pressure fed from't'he container A `under-determinable conditions of flow through a compensating valve E comprisingapreferably frustoconical valve-member 2`"s'hiftable on a rod, such as the shank of a common-screw 26, dependingly adjustably threaded into the upper Wall of a valve chamber 27 communicatingwith the chamber A through a passage-28 lcored-in the coverB, said'cliamber v27 being preferably bored .inthe cover-B vfor forming at" its# end; anv annular rim adapted for.,` inipingement'by the-valve-member 25', the latterfbeing; yieldingly'seated under urging of a compressionspring'29lembracing the screw andI bearingbetween itshead and the member L25' for lregulatively communicating the container A' with the containierC.v Y

Depending in the container vC to a point adjacent the-bottoni wall'7-thereof, is a feed tube30 preferably -lledwfithia-suitable filteringx medium, as cotton wicking; 31, and threadedat its upper endinto a cored passageway 32 provided inthe-cover B, said passagewayextendingupwardly into a valvechamber 33`provided transversely in a mixerhead F upstandingcentrally fromthe cover B. Another passageway 34y diagonally coredin the cover Bandhead F suitably f communicatesthe 4container `Ai with a valve chamber-B-fprovided 'inVA the head t-F forwardly `converging towards' the valve v chamber 33.(Fgure2)l f' w suitably provided 'with` handles 36, and forwardly threaded into the rearwardlydivergent ends of the chambers 33, 35', through suitable stuffing boxes 37, are, respectively, a'fuel 'needle-valv'e and an air-needle-valve 39-adaptedito co-operatively, seatk into respectiveaxial ports 33', 35"l'eading'respectively a common mixing chamber 40 provided forwardly. in the `head F for controllable con- Y fluentflow. offluids-ffrom the chambers 33,

35,1thereinto, said mixing-chamber beingprovidedY with preferably' brass mixing-screens 41 or the like, flowably traversed by thefconfluent fluids for effective agitation and commingling thereof.

Y' Such commingled fluids are preferably also subjectedto suitable heating means for gasify-ingor vaporizing the fuel, and for such purpose the walls'ofithe chamber 40 are exteriorly provided with Y lateral "heating ns or flanges, as 42, under which is provided a generating cup 43, as it may be described, formed by walls 44 upstanding from the cover. B suitably for the purpose (Figure 3). The cup 43 is supplied with fuel from the container C through a port 45 forwardly opening through the head F under the mixing-chamber 40 and communicating with an end of a valve chamber 46 having, in turn, communication through a passageway 47 cored in the head F and cover B with a secondcapillary tube 48 dependingly'threaded at an end-in the passageway47 andl also extending. to a point adjacent Vthe bottom wall 7 ofthecontainer C, said tube 48 being prefera'bly also filled with the cotton wicking 31. A needle valve 49, having a rearwardly disposed handle 49', is threaded forwardly through -astuHin'g-box 50 into the valve chamber 46 for co-operatively seating in the port=45'for--controllingthefeedy of fuel' to thegenerating cup v43. A Y

The mixing-'chamber 40 opens'` forwardly -endwise from the mixing headfF and; has

thereinto threadedly` and abuttinglyf engaged a conic-ended.burnertip 51 provided with a longitudinal-bore 52 suitably at its inner 'end expanded and communicating with the chamber 40V. for Vflow therefrom into and through lthe burner-tip 51y of the' mixed and vaporized combustibleffluids. p

The-'particularembodiment of my invention,A illustrated lis ofi the siz-ef'and type common-ly known 'as :al hand-torch, `and for such purpose agrip or handle *.53 is suitably mounted exteriorly on the rearrside ofv the containerA oppositely from-thetipl, as will be readily'understood and ias best" seen in Figure'2. OI f In assembling the torch, the-compensating valve E is adjusted by suitably manipulating the screw 26? for tensioning the spring 29, which, urging Athevalve `25 on its seat at. the valvechamber 27, thus predeterminably reg"- ulates-'theflow of fluid from the container. A

tolthe' containery C responsively Vtov drop in tainer A,- andf aliquid-fuel, as gasoline' or the like, in the container C. However, I wish to `vstate that', suitable; modificatiom'such as af tube'depending ain. the containerl A, of theconnection between said container andthe valve chamber 35, another liquid constituent may be employed in the container A, if desired. If air and gasoline are used, the latter is introduced into the container C, and air under pressure introduced into the container A by manipulation of the pump D, the pressure in the container C being raised to its said minimal pressure by flow of air thereinto through the compensating` valve E from the container A.

When using gasoline or like vaporizable or gasifiable fuel, as in the present instance, a sufficient or desired quantity of the fuel is introduced into the generating-cup 43` by manipulation of the valve 49, and the contents of the cup 43 lighted for preheating the mixing chamber 40, the valve 49 being opened shortly before the fuel in the cup 43 is burned out, sufficiently to maintain a pilot or heating flame under the chamber 40. The chamber 40 being properly heated, the fuel-needle valve 38 is employed suitably for controllably admitting the gasoline to the mixing chamber for gasification therein, and then, by means of the air-needle valve 39, a. sufcient amount of air, as I will shortly point out, is admitted to the mixing chamber 40 and there commingled with the fuel gas, the confluent combustible gases being ignitably discharged through the burner tip 51, as described.

By properly proportioning the ratio of air to gasoline, the resulting flame from the torch may be made oxidizing, reducing, or neutral in character, and hence my invention may successfully be employed for heating, cutting, or welding, as may best serve the purposes intended.

And the flame from the torch is particularly steady and uniform by reason of the action of the compensating1 valve E, which functions efficiently and automatically for effecting a uniform ratio of pressures in the containers A and C Yand maintaining the selected proportionate admission of fiuids therefrom into the mixing chamber 40.

I might add that, for such purpose, I prefer to proportion the relative capacities of the containers A and C such that there will be a surplus of air available at all times for maintaining the fluids in the containers A and C Within the determined minimal pressure differences, the relative capacities of the containers A and C and the minimal difference to be maintained being selected suitably in view of the fluids to be employed. The jetflame Will not vary in its characteristics asY long as there is pressure, and obviously, the intensity of a diminishing fla-me may be stimulated by use of air-pump D. f

It is to be understood that changes and modifications in the form, construction, arrangement, and combination of the several parts of the torch may be made and substituted for those herein Shown and described without departing from the nature and principle of my invention.

Having thus described my invention, what is: Y

l. A torch comprising, in combination, an outer container, an inner container,ay topclosure common to said containers, the closure iaving a port for providing communication between said containers, means comprising a biased valve for automatically regulating communication through said port between the containers, the closure having a mixingchamber and separate communicating pasisages 4for providing communication between:

having a port for providing communication between said containers, means comprising a yieldingiy adjustable valve for automatically regulating communication through said port between the containers, a mixing-chamber providing head mounted on the closure,

the closure and head having separate communicating passages for providing communication between the respective containers and the mixing-chamber, valves for independently controlling communication through said passages between the respective containers and the mixing-chamber, and a burner-tip for directional Vdischarge of fluid from the mixing chamber.

3. A torch comprising, in combination, an

outer container, an inner container, a topclosure common to said containers, the closure having a port for providing communication between said containers, means comprising a biased valve for automatically regulating communication through said port between the containers, the closure having a mixing-chamber and being provided with diagonally disposed separate passages for providing communication between the con# tainers and the mixing-chamber, a pair of valves having divergent stems for independently controlling communication through said passages between the respective containers and the mixing-chamber, and a i burner-tip for directional discharge of fluid from the mixing-chamber.

4. A torch comprising, in combination, an outer container, an inner container, a top-closure common to said container, the closure,``

having a port for providing communication between said containers, means comprising a biased valve for automatically regulating communication through said port between the containers, the closure having a mixing-L,

I claim and desire to secure by Letters Patent Y uoc chamberand being provided vwith separate passages for providing oommunioationbe- Atween'the containers and the mXing-chamber, valves for independently controlling communication through said passages betweenthe .respective containers andfthe mixing-chamber, aburner-tip for directional disharge offiuid'from the mixing cha1nber,-,the closure having ya generating-cup disposed under and `adjacent tothe mixing-chamber,

`and-means for supplying the cup with combustible fluid from one of-said containers. Y

fInztestimony whereof, I have signed my name to lthis specification.

MARKUS M. soHWARzKoPF. 

